Section 1 • General Information
Gas Compressor Unit Model Designations
The compressor unit model designation can be found on the nameplate. For nameplate location, see Component Identification on section page
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Figure 1-1. Gas Compressor Unit Model Designation
1. Compressor Model
VSG = Vilter Single Screw Compressor
VSSG = Vilter Single Screw Compressor
(Compressor models 291, 341, 451 & 601 - these are 240mm diameter rotors with counter clockwise rotation)
VRSG = Vilter Twin Screw
2. Size
CFM - Nominal CFM displacement of the compressor at 3600 rpm
3. Slide Arrangement
VVR = Variable Volume Ratio; Parallex™
4.Gas Compressed L = Landfill Gas
D = Digester Service Site Application N = Natural Gas (Primarily Methane) G = Other Gas Type
5.Application
HP = High Stage with Oil Pump
HN = High Stage no Oil Pump
6. Driver
VFD = Variable Frequency Drive
EMD = Electric Motor Drive
ENG = Engine Drive
7. Separator Type |
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16 = 16 inch diameter | 36 = 36 inch diameter |
20 = 20 inch diameter | 42 = 42 inch diameter |
24 = 24 inch diameter | 48 = 48 inch diameter |
30 = 30 inch diameter | 54 = 54 inch diameter |
H = Horizontal | V = Vertical |
SH = Special Horizontal | SV = Special Vertical |
8. Economizer
NEC = No Economizer, Economizer Ports Plugged HEC = Holes drilled in Economizer Plug for Oil
or Unloading
9.Oil Cooler PLT = Plate
ST = Shell and Tube REM = Remote
10.Oil Cooling Medium REF = Refrigerant
WTR = Water GL = Glycol AIR = Air
1 – 2 | VSG/VSSG • Installation, Operation and Maintenance Manual •Vilter/Emerson • 35391SSG |
